how to clear the buffers ? AT+SBDD

[JimKruk]

I think this is the same issue that PaulZC reporton on 2/4/2018. the problem I am having is when I send a new message e.g. err = modem.sendSBDText(indata); it is not clearing something in a buffer somewhere. So later if I try and receive message it first sends a message that I had sent earlier in the day, then I receive a new message. I contact RockBlock and they suggested to use the function AT+SBDD but I have no idea how to implement this :( Would it be possible to modify the modem.sendSBDText routine to clear the buffer or add another function to do this ? If I power down the device and power back up and try to receive a new message the outbound buffer is clear so something must be left in memory somewhere in the rockblock ? thanks !

[PaulZC]

Hi,
This does sound like the same 'issue' #10.
I have the 9603 connected to Serial2 on a SAMD21 M0. I'm forcing the AT+SBDD with a serial write that bypasses the IridiumSBD library. The relevant bits are:

#include <IridiumSBD.h>
...
HardwareSerial &ssIridium(Serial2);
...
IridiumSBD isbd(ssIridium, IridiumSleepPin);
...
ssIridium.begin(19200);
...
...
// Very messy work-around to clear MO buffer
ssIridium.println("AT+SBDD0");
delay(5000);
while(ssIridium.available()) { // Flush RX buffer
ssIridium.read(); // Discard anything in the buffer
//Serial.write(ssIridium.read()); // Or use this for debugging
}

I hope this is of use,
Paul

[JimKruk]

Hi Paul
Thank you for the quick reply and sample code !